Are you just putting water in it instead of 50/50 mix? It needs coolant, not just water. Also, it could be your thermostat. It might be reading it wrong. They shouldn't be hard to replace in a Mazda. Try those two things, and your problem should be solved.
I honestly don't think it could be the radiator because it probably wouldn't be running if it were, but if these two things don't work, have a tech look at your radiator.
EDIT:
Ok. I looked this up and this is what it said.
"There are 4 main causes of this; thermostat, blocked radiator and water pump/belts."
My source is for a Mazda rx7, but all cars should be similar.
2006-06-16 19:02:50
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answer #1
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answered by Doesnt Matter 3
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Radiator cores could be blocked.
Radiator pipes 'soft' and sucking closed.
Water pump faulty, not circulating the fluid.
Thermostat not opening, you can check it by putting it in hot water to see if it opens.
Radiator cap defective.
Head gasket blown, losing water into exhaust or into engine oil, pressure in radiator.
Check timing.
Regards.
2006-06-16 19:10:00
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answer #2
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answered by Featherman 5
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You may need to replace the thermostat. Which regulates the antifreeze. When this part goes bad, it may cause your car to over heat. It will be cheaper if you buy the part at your auto part store and replace it yourself.
2006-06-16 19:28:36
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answer #3
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answered by Rafa 3
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How is it running hot? Thermostat checked?
2006-06-16 19:14:38
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answer #4
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answered by BRIAN R 1
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you might have a worn out water pump, your system my hold water but the pump isn't moving the water properly have it replaced
2006-06-16 19:04:18
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answer #5
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answered by slyman202 2
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